[1] In 1976, Lord Buckhurst, as he then was, began a financial career in the City of London as an investment banker at Mullens & Co.[2] For 24 years, he was a director of Laing & Cruickshank and later of its owner Credit Lyonnais Securities, for which he worked in equity sales and published a tip sheet called The Earl's Earner.
[5] Beyond his work in the City of London, De La Warr is a dairy farmer and as of 2016[update] was still breeding livestock at his family seat, Buckhurst Park, East Sussex.
[1][6] In 2009, De La Warr began to hire out the library and an adjacent drawing room of Buckhurst Park for weddings, as a way of "adapting to stay afloat", in response to Britain's then-current economic crisis.
[4] The result became the Buckhurst Park sausage, a product made by Speldhurst Quality Foods, in which De La Warr owned a stake, sold nationally in Waitrose supermarkets.
[16][17] In October 2021, De La Warr bought the original Poohsticks Bridge for some £131,000 (equivalent to about £156,000 in 2023), intending to give it "pride of place" in Buckhurst Park[18] but later had to sell it given the high restoration costs.